Pulse disappear in digital scope just by looking at different signal in other channel.
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I have a HANTEK 6022BE oscilloscope and I'm monitoring three signals with it:
- FS (Frame sync clock).
- Pulse.
- Transfer complete.
I'm using two channels of the scope to monitor a pair of these.
The problem is when I'm looking at signal 1 (in blue) and 2 (in yellow) I see this:
When looking at 2 (pulse, in yellow) and 3 (TC, in blue) I get this:
Magically one pulse of signal 2 (pulse) has vanished! But why?
Generally looking at pulse alone will cause neglecting one pulse. But only by signal FS all 6 pulses will be visible. How can this happen?!?
1 answer
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The problem was the transient you can see in the first picture, the blue one. When I connect the scope to it, it becomes stabilized. Otherwise it is noisy and because of this the other signal changes.
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